Menu
Search
Filters
Close
Menu

Save 20% on select titles with code HIDDEN24 - Shop The Sale Now

The Effect of Low Temperature Diffusional Heat Treatments on the Corrosion Resistance of Nickel Alloys

Picture for The Effect of Low Temperature Diffusional Heat Treatments on the Corrosion Resistance of Nickel Alloys
Available for download

Conventional diffusional heat treatments are usually performed when an increase on the surface hardness of a certain component is desired. However, some alloys, such as duplex stainless steels and nickel alloys cannot be submitted to the temperature ranges that these treatments require due to the precipitation of deleterious phases. Besides that, since these alloys are used in highly corrosive environments, the effect of those treatments on corrosion resistance is a point that deserves special attention.
This paper presents a study about the effect of two different diffusional heat treatments on the corrosion behavior of two nickel alloys (UNS N07718 and UNS N09925). The first one (HT#1) can be classified as a carburizing process, and the second (HT#2) as a nitriding process. Treated and untreated samples were analyzed through a corrosion test called critical pitting temperature (CPT) that was determined through an electrochemical method, according to ASTM G150, and by a chemical one, per ASTM G48. The results showed that the heat treatments presented opposite effects on the substrates. HT#1 improved the corrosion resistance of both substrates, although 925 HT#1 presented a lower CPT value by ASTM G48, which can be explained due to the test method aggressiveness, and HT#2 reduced their CPT. In all cases where pits were observed, they were macroscopic.

Product Number: 51320-14623-SG
Author: Daniela de Figueiredo Cavalcante, Mariana Georges M. de Carvalho, Marcella Araujo Lage, Fabio Pereira Alves, Kioshy Santos de Assis, Oscar Rosa Mattos
Publication Date: 2020
$0.00
$20.00
$20.00
Product tags
Also Purchased
Picture for 08189 New Experiences with Nickel Alloys and Special Stainless Steels for an Optimized Material Sele
Available for download

08189 New Experiences with Nickel Alloys and Special Stainless Steels for an Optimized Material Selection in Acids at High Temperature

Product Number: 51300-08189-SG
ISBN: 08189 2008 CP
Author: Helena Alves and Ralph Baessler
Publication Date: 2008
$20.00
Picture for The Sensitisation Behaviour of Alloy UNS N08825 After Heat Treatment as Used in Clad Materials
Available for download

The Sensitisation Behaviour of Alloy UNS N08825 After Heat Treatment as Used in Clad Materials

Product Number: 51317--9459-SG
ISBN: 9459 2017 CP
Author: Helena Alves
Publication Date: 2017
$20.00

The aim of this paper is to present recent standard test corrosion data obtained in laboratory for alloy UNS N08825 after post weld heat treatment in comparison with as delivered (soft annealed) material.

 

Picture for 08085 High Performance Corrosion Resistant Stainless Steels and Nickel Alloys for Oil & Gas Applications
Available for download

08085 High Performance Corrosion Resistant Stainless Steels and Nickel Alloys for Oil & Gas Applications

Product Number: 51300-08085-SG
ISBN: 08085 2008 CP
Author: Dirk Aberle and Dinesh C. Agarwal
Publication Date: 2008
$20.00

In a 1998 study, costs for corrosion in USA were estimated to be about 276 billion US-$.  One way to reduce this gigantic amount of money is to use modern stainless steels and nickel alloys with excellent resistance to various forms of corrosion in corrosive environments like seawater, brines, oil and sour gas wells.
Categories
Industry
Recently viewed
Popular tags
View all

Association for Materials Protection and Performance

© AMPP All Rights Reserved.
Membership Terms of Content Use
Contact Customer Support